130 



GUATEMALAN BLATTIDAE 



Interocular width slightly over three-quarters that between antennal sockets, 

 as in that species.^ Supra-anal plate weakly transverse, length slightly 

 over half proximal width, free margins nearly straight, convergent to weakly 

 bilobate distal portion, which is less strongly chitinous and is supplied with 

 long hairs. Cerci small, elongate and slender (having eleven joints), the 

 sutures well marked, the dorsal surface fiat; generally as in lamprus. Con- 

 cealed genitalia as follows. From the base of the sinistral cercus an elongate, 

 somewhat irregular, chitinous finger extends two-thirds the distance across 

 the anal chamber, expanding slightly dorsad at its rounded apex, its caudal 

 surface moderately concave throughout.^ Subgenital plate rather strongly 

 convex except in small meso-distal area, where it is weakly concave; surface 

 supplied with elongate scattered hairs; free margins evenly convergent and 

 ghowing very slight convexity to median fourth, which section is symmetri- 

 cally trapezoidal with angles rounded. Sinistral style situated at base of 



Chromatonotus agunae new species. Fig. 1. Dorsal view of pronotum. 

 Fig. 2. Ventral view of subgenital plate. Fig. 3. Caudal view of con- 

 cealed sinistral genital process. (All much enlarged.) 



this median and produced portion, minute, simple, cylindrical, very feebly 

 tapering to the rounded apex, about three times as long as its basal width. 

 Dextral style situated at dextral angle of produced portion, minute, rounded, 

 conical, slightly longer than broad, terminating in a miiuite but stout spine, 

 which is slightly decurved, the dorsal surface of the style occupied by a sim- 

 ilar, but smaller, spine, while the margin of the plate, just sinistrad of the 

 base of this style is armed with three similar spines. Limb armament, pul- 

 villi, tarsal claws and arolia as characteristic of the genus. 



Head blackish carob brown, ocellar si)ots buffy. Antennae proximad 

 buckthorn brown, beccmiing darker in remaining portions. Mouthparts, 

 maxillary palpi and limbs ochraceou.s-bufT tinged with tawny, the maxillary 



" Ocellar spots not conspicuijus, probably becau.se this specimen is a dried 

 alcoholic. 



^ Soft integument unfortunately conceals the dextral si)ecializati(>n. 



